Vehicle fuel tank

1. A fuel tank having a wall with an inside surface defining the interior of the tank and a fuel tank sub-component adapted to be coupled to said inside surface of the wall at a location in which the wall is free of openings that pass through the wall and without compromising the integrity of the wall;

the fuel tank comprising a plurality of spaced apart locking recesses formed in the wall of the fuel tank and a plurality of angled ramps, the ramps extending between a distal end spaced from an adjacent one of the locking recesses and a proximal end terminating at the adjacent one of the locking recesses, wherein each of the ramps slopes inwardly towards the interior of the fuel tank from the distal end to the proximal end; the fuel tank further comprising a plurality of undercut portions formed in the wall of the fuel tank, wherein the undercut portions are spaced between the locking recesses;

the subcomponent comprising a central male locating element defining a central axis, a plurality of spaced apart locking elements connected to the locating element by attachment regions projecting radially from the locating element, and a plurality of retention wings extending radially from the locating element and spaced between adjacent locking elements;

wherein the locking elements engage and slide along the angled ramps and are matingly received by the locking recesses and the retention wings are lockingly engaged with the undercut portions in response to rotation of the sub-component with respect to the wall of the fuel tank in a first direction to thereby interlock the sub-component to the fuel tank.

2. The fuel tank of claim 1 , wherein the sub-component comprises a housing having an opening receiving a part for mounting in the interior of the fuel tank.

3. The fuel tank of claim 2 , wherein the part is a valve.

4. The fuel tank of claim 3 , wherein the valve is one of a gas vent valve, a control valve, and a fuel limit vent valve.

5. The fuel tank of claim 2 , wherein the housing is injection molded.

6. The fuel tank of claim 2 , wherein the housing comprises a plastic material selected from the group of: polyoxymethylene and polyphthalamide.

7. The fuel tank of claim 1 , wherein the fuel tank further includes a central locating surface recessed in the wall of the fuel tank for receiving the male locating element of the sub-component to align the sub-component with the fuel tank along the central axis.

8. The fuel tank of claim 7 , wherein the plurality of angled ramps comprises two diametrically opposed angled ramps.

9. The fuel tank of claim 1 , wherein the fuel tank is manufactured by a method selected from the group of: stamping, hydro forming, blow molding, injection molding, and twin sheet vacuum forming.

10. The fuel tank of claim 7 , wherein each retention wing is provided with an assembly finger extending circumferentially from the retention wing for engaging and guiding said retention wings into said undercut portions of said fuel tank in response to rotation of the sub-component relative to the fuel tank in the first direction.

11. A fuel tank as claimed in claim 1 , wherein the sub-component is provided with at least one metal element that is detectable from externally of the fuel tank to confirm full engagement of the component with the fuel tank.